Sound-amplifying horn.



-.No, 873,643. PATENTED DEC. 10, 1907. J. P. WHEELER.

SOUND AMPLIFYING HORN.

APPLICATION FILED MAY 15, 1907.

UNITED STATES PATENT OFFICE.

DE WITT, OI GRAND VALLEY, COLORADO.

SOUND-AMPLIFYING HORN.

- more distinct in its passage therethrough.

My invention further resides in the featu-res of construction hereinafter described with reference to the accompanying drawing in which like numerals are used to designate like parts throughout the several figures, and in which,

Figure is a central longitudinal sectional view taken through my improved horn.

. instrument.

Fig. 2 is an end view looking forwardly into the same. Fig. 3 is a rear end elevation, and Fig. 4 is a face view of the blank used to form the bell end of the horn.

In the practical embodiment of my invention I provide a horn comprising an elongated, gradually enlarging throat portion 1,

cylindrical in form, and provided on its smaller end with a contracted tube 2, adapt ed for attachment to the phonograph or like Said throat 1 is further provided on its large end'with a circumferential outstanding flange 3. The horn further comprises a flaring bell mouth 4, provided on its inner end with. an angularly extending circumferential flange 5 and rovided on its inner surface with a series o open channels 6 and a series of closed sound recoiling pockets 7, said channels and said pockets being formed within said bell 4 radiating from its inner end proportionate to its flare, and

. arranged in alternating circular series.

The bell mouth 4 is preferably constructed from a blank 8, illustrated in Fig. 4, which in the forming of said bell, is bent until its edges 9 are drawn together and suitably secured.

I Specification of Letters Patent.

Application filed May 15. 1907. Serial No- 373.749.

The bell 4 is further secured to form Patented Dec. 10, 1907.

a continuous structure with the throat 1 by means of a two-part sounding drum 10, in the form of an enlarged encircling ring, sen-1icircular in cross section, and attached to said threat 1 and said. bell 4 by means of their respective flanges 3 and 5. The throat JAMES F. WHEELER, or GRAND VALLEY, COLORADO, ASSIGNOR or oNEn Lr ro FRANK. w.

1 and the bell 4 are further connected Within the drum 10, on a plane with their inner surfaces, by means of a suitable screening 11, which cooperates with said drum 10 and the remainder of the structure in producing the desired amplification and added distinctness of sound.

Having thus fully described my invention I claim:

1. In a sound amplifying horn, the combination of the throat portion, adaptable for attachment to an instrument, a flaring bell mouth spacedly connected to said throat portion, an enlarged sounding drum spanning the spam; between said throat and bell, and

sound recoiling devices arranged in said bell mouth, substantially as described;

ii. In a sour 'l amplifying horn, the combination with the throat portion, adapted for attachment to an instrument, a' flaring bell mouth spacedly connected to said throat portion, an enlarged curved sounding drum spanningthe space between said throat and said bell and sound recoiling pockets and sound channels alternately arranged upon the inner surface of said bell mouth, substantially as described.

3. In a sound amplifying horn, the combination of a gradually enlarging throat por tion, adaptable for attachment at one end to an il'lstrument, a flaring bell. mouth spacedly connected to the other end of said throat portion, an enlarged circular sounding drum spanning the space between said throat and said bell, and a plurality of sound recoiling pockets and sound channels formed upon the inner surface of said bell mouth and radiating outwardly, substantially as described.

4. In a sound amplifying horn, the combi nation of a throat portion gradually increasing in diameter, and adaptable for attachment at its smaller end to an instrument, a flaring bell mouth spacedly connected to said throat portion, an enlarged circular sounding I mouth and radiating outwardly, substandrum', curved in cross section, spanning the tiall; as described; v space between said throat Portion and said In testimony whereof I afiix my signature bell mouth, a circular sectlon of screening in presence of two witnesses. connecting said throat and saidbell within JAMES F. WHEELER. said drum, and a plurality of sound recoiling Witnesses: V

pockets and'sound channels alternatel ar- F. W. DE WITT,

- ranged upon the inner surface of sai 'bell W, SPERCER. 

